libdc1394 is a library that is intended to provide a high level programming interface for application developers who wish to control IEEE 1394-based cameras that conform to the 1394-based Digital Camera Specification (found at http://www.1394ta.org/).

The ADAPTIVE Communication Environment (ACE) is an object-oriented (OO) C++ framework that helps you develop and deploy high-performance networked applications faster and with less code to write and maintain. ACE is especially useful for systems that use network and/or inter-process communications and that take advantage of multithreading. While the ACE source code is free, that's not the only way you save money with ACE. ACE's wrappers and higher-level patterns help you develop your software quickly and portably, helping you to complete your projects on time and within budget.

AdaCGI is an Ada95 interface to the "Common Gateway Interface" (CGI). AdaCGI makes it easier to create Ada95 programs that can be invoked by World Wide Web (WWW) HTTP servers using the standard CGI interface. Using it, you can create Web applications using Ada95 to perform queries or other processing by request from a WWW user.

adns is a replacement resolver library. Its programming interface is at once easier to use and more powerful than the standard libresolv. For example, responses are automatically decoded into native C formats, and it is possible to launch many queries and once and deal with the responses asynchronously.

ADODB is a set of advanced PHP database
abstraction classes. It supports MySQL,
PostgreSQL, Interbase/Firebird, Informix, Sybase
SQL Anywhere, Oracle, MS SQL 7 and 2000, SAP DB,
Sybase, DB2, FrontBase, Foxpro, Access, Netezza,
LDAP, ODBTP, ADO, and generic ODBC. A metatype
system is built in, making it possible to figure
out that types such as CHAR, TEXT, and STRING are
equivalent in different databases. It also
features portable database creation,
database-backed session support (with encryption),
SQL performance monitoring, and database health
checks.